have u ever try rainx

what brand u used?

i have used rainx before, the yellow box that's for water repellent for car windscreen...it's very acidic and might do the work for u

the best and cheapest watermark remover i've used was Jusco own in-house brand

to use rainx, first u pour it onto a clean cloth, then rub it onto ur windscreen, wait ubntil there's fog bulit up at ur screen and wipe it with newspaper until it's shining clear/until there's no fog anymore, that's how i use it....

Maybe you need polish. But you shouldn't leave your watermark liquid dry on you screen..

You can try use Soft 99 Glass Refresh   

Watermark remover shouldn't wait it fog, unless you are talking about those water repellent.

Just go buy those polish compound and try polish yourself with some microfiber slowly small area and see.

u can use soft 99 or any car polish.. but must not hand polish... need buffing machine. or else just go to your nearest car wash that offer body polish and pay them to polish your windscreen.

clean n slippery

sorry but, hahahahahahasobsobsobsob  , when do people actually learn..
why facebook.. too many cure cancer fb posts which caused more harm.

you can start by posting what you have just applied on ur windscreen.
personally, i just get 2-3 bunch of steel wool 0000 grade (very fine type- can catch fire fast)
then scrub ur whole windscreen clean.

watermark all will go away after a few pass.

then clean area good and top a coat of rainX or rain repellent.
(also clean the wiper blades properly, by taking it off and wash until no black marks)
rubber blades loves to leave residue which is why I dont use em.

please show what u applied.
if it etches ur glass, then no choice, need to special cut (polish) the glass.

2nd method i rarely do is use a glass scrapper and some detergent as lub.
glass scrapper will level any gunk to bare glass level with no scratch (if done properly)

Kena before. Just use meguire polish can take it off

rm150 rip off,
go to other shop pay them 80 is more than enough

if u want cheap diy, use cutter knife , the small one, and scrape the spots .
there is no point me helping you on how to negotiate because u don't have the basic understanding and u can't win argument over with them, your only best option vs them is tell them take it or leave it and u keep searching for next car wash.
I read that u actually use soft99 to polish it without results..
possible explanation is you use your finger to rub it or u didn't do it the correct way.
correct way is to rub using your palm in circular motion. with firm pressure.

Use THINNER to wipe .THINNER is so perfect
I use to wipe interior &exterior .wipe out bird shit easily ,no paint damage

Look for something call rubbing compound polisher. The soft99 liquid Polish is too weak. Avoid sand paper or steel wool unless you know what are you doing. Avoid thinner at all cost. A single mistake your car paint is gone.

Anyway I suspect those are calcium deposits soften by the water spot cleaner. Try to apply the same product on it again, and this time keep wiping with clean cloth.

Yeah. Also caused by watermark remover.
That time I asked for help in car forum. Not lowyat. Around 2006-2007. Someone posted me some of meguire product to polish it out. Just using hand not machine

i only know is meguire polishing product. that guy just gave me some in small plastic bottle. i just polish it with regular sponge then ok already.